X-Git-Url: http://bilbo.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/4b4bf86d97cde4f9814db6ed79bf99b797204e80..e709643ef0c5b61c6c878016c418bffa2b1b20cd:/include/simgrid/s4u/Activity.hpp diff --git a/include/simgrid/s4u/Activity.hpp b/include/simgrid/s4u/Activity.hpp index 1c87d16e4d..fbf8993242 100644 --- a/include/simgrid/s4u/Activity.hpp +++ b/include/simgrid/s4u/Activity.hpp @@ -27,47 +27,82 @@ namespace s4u { class XBT_PUBLIC Activity { friend Comm; friend Exec; - friend ExecSeq; - friend ExecPar; friend Io; protected: Activity() = default; virtual ~Activity() = default; + + void release_dependencies() + { + while (not successors_.empty()) { + ActivityPtr b = successors_.back(); + XBT_CVERB(s4u_activity, "Remove a dependency from '%s' on '%s'", get_cname(), b->get_cname()); + b->dependencies_.erase(this); + if (b->dependencies_.empty()) { + b->vetoable_start(); + } + successors_.pop_back(); + } + } + + void add_successor(ActivityPtr a) + { + successors_.push_back(a); + a->dependencies_.insert({this}); + } + public: + void vetoable_start() + { + state_ = State::STARTING; + if (dependencies_.empty()) { + XBT_CVERB(s4u_activity, "All dependencies are solved, let's start '%s'", get_cname()); + start(); + } + } + #ifndef DOXYGEN Activity(Activity const&) = delete; Activity& operator=(Activity const&) = delete; #endif - enum class State { INITED = 0, STARTING, STARTED, CANCELED, ERRORED, FINISHED }; + enum class State { INITED = 0, STARTING, STARTED, CANCELED, FINISHED }; /** Starts a previously created activity. * * This function is optional: you can call wait() even if you didn't call start() */ virtual Activity* start() = 0; - /** Blocks until the activity is terminated */ + /** Blocks the current actor until the activity is terminated */ virtual Activity* wait() = 0; - /** Blocks until the activity is terminated, or until the timeout is elapsed + /** Blocks the current actor until the activity is terminated, or until the timeout is elapsed\n * Raises: timeout exception.*/ virtual Activity* wait_for(double timeout) = 0; - /** Blocks until the activity is terminated, or until the time limit is reached + /** Blocks the current actor until the activity is terminated, or until the time limit is reached\n * Raises: timeout exception. */ void wait_until(double time_limit); /** Cancel that activity */ virtual Activity* cancel() = 0; /** Retrieve the current state of the activity */ - Activity::State get_state() { return state_; } + Activity::State get_state() const { return state_; } void set_state(Activity::State state) { state_ = state; } - /** Tests whether the given activity is terminated yet. This is a pure function. */ - virtual bool test() = 0; - virtual const char* get_cname() = 0; - virtual const std::string& get_name() = 0; + /** Tests whether the given activity is terminated yet. */ + virtual bool test(); + + /** Blocks the progression of this activity until it gets resumed */ + virtual Activity* suspend(); + /** Unblock the progression of this activity if it was suspended previously */ + virtual Activity* resume(); + /** Whether or not the progression of this activity is blocked */ + bool is_suspended() const { return suspended_; } + + virtual const char* get_cname() const = 0; + virtual const std::string& get_name() const = 0; /** Get the remaining amount of work that this Activity entails. When it's 0, it's done. */ - virtual double get_remaining(); + virtual double get_remaining() const; /** Set the [remaining] amount of work that this Activity will entail * * It is forbidden to change the amount of work once the Activity is started */ @@ -76,41 +111,6 @@ public: /** Returns the internal implementation of this Activity */ kernel::activity::ActivityImpl* get_impl() const { return pimpl_.get(); } - void add_successor(ActivityPtr a) - { - successors_.push_back(a); - a->add_dependency_on(this); - } - void remove_successor() { successors_.pop_back(); } - ActivityPtr get_successor() { return successors_.back(); } - bool has_successors() { return not successors_.empty(); } - - void add_dependency_on(ActivityPtr a) { dependencies_.insert({a}); } - void remove_dependency_on(ActivityPtr a) { dependencies_.erase(a); } - bool has_dependencies() { return not dependencies_.empty(); } - void release_dependencies() - { - while (has_successors()) { - ActivityPtr b = get_successor(); - XBT_CDEBUG(s4u_activity, "Remove a dependency from '%s' on '%s'", get_cname(), b->get_cname()); - b->remove_dependency_on(this); - if (not b->has_dependencies()) { - b->vetoable_start(); - } - remove_successor(); - } - } - - void vetoable_start() - { - state_ = State::STARTING; - if (not has_dependencies()) { - state_ = State::STARTED; - XBT_CDEBUG(s4u_activity, "All dependencies are solved, let's start '%s'", get_cname()); - start(); - } - } - #ifndef DOXYGEN friend void intrusive_ptr_release(Activity* a) { @@ -121,10 +121,18 @@ public: } friend void intrusive_ptr_add_ref(Activity* a) { a->refcount_.fetch_add(1, std::memory_order_relaxed); } #endif + Activity* add_ref() + { + intrusive_ptr_add_ref(this); + return this; + } + void unref() { intrusive_ptr_release(this); } + private: kernel::activity::ActivityImplPtr pimpl_ = nullptr; Activity::State state_ = Activity::State::INITED; double remains_ = 0; + bool suspended_ = false; std::vector successors_; std::set dependencies_; std::atomic_int_fast32_t refcount_{0}; @@ -136,14 +144,20 @@ template class Activity_T : public Activity { void* user_data_ = nullptr; public: + AnyActivity* add_successor(ActivityPtr a) + { + Activity::add_successor(a); + return static_cast(this); + } + AnyActivity* set_name(const std::string& name) { xbt_assert(get_state() == State::INITED, "Cannot change the name of an activity after its start"); name_ = name; return static_cast(this); } - const std::string& get_name() { return name_; } - const char* get_cname() { return name_.c_str(); } + const std::string& get_name() const override { return name_; } + const char* get_cname() const override { return name_.c_str(); } AnyActivity* set_tracing_category(const std::string& category) { @@ -151,7 +165,7 @@ public: tracing_category_ = category; return static_cast(this); } - const std::string& get_tracing_category() { return tracing_category_; } + const std::string& get_tracing_category() const { return tracing_category_; } AnyActivity* set_user_data(void* data) { @@ -159,7 +173,7 @@ public: return static_cast(this); } - void* get_user_data() { return user_data_; } + void* get_user_data() const { return user_data_; } #ifndef DOXYGEN /* The refcounting is done in the ancestor class, Activity, but we want each of the classes benefiting of the CRTP * (Exec, Comm, etc) to have smart pointers too, so we define these methods here, that forward the ptr_release and